From 0e9c582aeb9653ae2f9b05a7ea3a635d35b2e97e Mon Sep 17 00:00:00 2001
From: cignoni <paolo.cignoni@isti.cnr.it>
Date: Mon, 3 Nov 2014 15:07:07 +0000
Subject: [PATCH] first sample for harmonic interpolation

---
 .../trimesh_harmonic/trimesh_harmonic.cpp     | 84 +++++++++++++++++++
 .../trimesh_harmonic/trimesh_harmonic.pro     |  8 ++
 2 files changed, 92 insertions(+)
 create mode 100644 apps/sample/trimesh_harmonic/trimesh_harmonic.cpp
 create mode 100644 apps/sample/trimesh_harmonic/trimesh_harmonic.pro

diff --git a/apps/sample/trimesh_harmonic/trimesh_harmonic.cpp b/apps/sample/trimesh_harmonic/trimesh_harmonic.cpp
new file mode 100644
index 00000000..9bf11501
--- /dev/null
+++ b/apps/sample/trimesh_harmonic/trimesh_harmonic.cpp
@@ -0,0 +1,84 @@
+/****************************************************************************
+* VCGLib                                                            o o     *
+* Visual and Computer Graphics Library                            o     o   *
+*                                                                _   O  _   *
+* Copyright(C) 2004-2009                                           \/)\/    *
+* Visual Computing Lab                                            /\/|      *
+* ISTI - Italian National Research Council                           |      *
+*                                                                    \      *
+* All rights reserved.                                                      *
+*                                                                           *
+* This program is free software; you can redistribute it and/or modify      *
+* it under the terms of the GNU General Public License as published by      *
+* the Free Software Foundation; either version 2 of the License, or         *
+* (at your option) any later version.                                       *
+*                                                                           *
+* This program is distributed in the hope that it will be useful,           *
+* but WITHOUT ANY WARRANTY; without even the implied warranty of            *
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             *
+* GNU General Public License (http://www.gnu.org/licenses/gpl.txt)          *
+* for more details.                                                         *
+*                                                                           *
+****************************************************************************/
+#include<vcg/complex/complex.h>
+#include<wrap/io_trimesh/import_ply.h>
+#include<wrap/io_trimesh/export_ply.h>
+#include<vcg/complex/algorithms/update/color.h>
+#include<vcg/complex/algorithms/update/quality.h>
+#include<vcg/complex/algorithms/harmonic.h>
+
+
+using namespace vcg;
+using namespace std;
+
+class MyFace;
+class MyVertex;
+struct MyUsedTypes : public UsedTypes<	Use<MyVertex>   ::AsVertexType,
+                                        Use<MyFace>     ::AsFaceType>{};
+
+class MyVertex  : public Vertex<MyUsedTypes,  vertex::Coord3f, vertex::Normal3f, vertex::VFAdj, vertex::Qualityf, vertex::Color4b, vertex::BitFlags  >{};
+class MyFace    : public Face< MyUsedTypes,   face::VertexRef, face::Normal3f, face::Mark, face::BitFlags, face::VFAdj, face::FFAdj > {};
+class MyMesh    : public tri::TriMesh< vector<MyVertex>, vector<MyFace>   > {};
+
+
+
+
+int main( int argc, char **argv )
+{
+  MyMesh m;
+  if(argc < 2 )
+  {
+    printf("Usage: trimesh_harmonic mesh.ply\n");
+    return -1;
+  }
+
+  int ret= tri::io::ImporterPLY<MyMesh>::Open(m,argv[1]);
+  if(ret!=0)
+  {
+    printf("Unable to open %s for '%s'\n",argv[1],tri::io::ImporterPLY<MyMesh>::ErrorMsg(ret));
+    return -1;
+  }
+
+  tri::UpdateTopology<MyMesh>::FaceFace(m);
+
+
+  srand(time(0));
+  int ind0=rand()%m.vn;
+  int ind1=rand()%m.vn;
+  printf("Computing harmonic field from vertex %i to vertex %i\n",ind0,ind1);
+
+  // Get the two vertices with value set
+  tri::Harmonic<MyMesh, double>::ConstraintVec constraints;
+  constraints.push_back(tri::Harmonic<MyMesh, double>::Constraint(&(m.vert[ind0]), 1.0f));
+  constraints.push_back(tri::Harmonic<MyMesh, double>::Constraint(&(m.vert[ind1]), 2.0f));
+
+  MyMesh::PerVertexAttributeHandle<double> handle = tri::Allocator<MyMesh>::GetPerVertexAttribute<double>(m, "harmonic");
+  bool ok = tri::Harmonic<MyMesh, double>::ComputeScalarField(m, constraints, handle);
+  assert(ok);
+
+  tri::UpdateQuality<MyMesh>::VertexFromAttributeHandle(m,handle);
+  tri::UpdateColor<MyMesh>::PerVertexQualityRamp(m,1,2);
+  tri::io::ExporterPLY<MyMesh>::Save(m,"harmonic.ply",tri::io::Mask::IOM_VERTCOLOR | tri::io::Mask::IOM_VERTQUALITY);
+
+  return 0;
+}
diff --git a/apps/sample/trimesh_harmonic/trimesh_harmonic.pro b/apps/sample/trimesh_harmonic/trimesh_harmonic.pro
new file mode 100644
index 00000000..56d4beae
--- /dev/null
+++ b/apps/sample/trimesh_harmonic/trimesh_harmonic.pro
@@ -0,0 +1,8 @@
+include(../common.pri)
+TARGET = trimesh_harmonic
+SOURCES += trimesh_harmonic.cpp ../../../wrap/ply/plylib.cpp
+
+CONFIG(release, debug | release){
+DEFINES += NDEBUG
+}
+